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• Data-storage company NetApp sank 12 percent. NetApp expects much weaker profit in the current quarter as a result of “increasing uncertainty” in the global economy.

• Pandora Media surged 12 percent after the online radio provider reported a smaller quarterly loss than analysts had expected. Ad sales and subscriptions soared over the year before. Pandora said it accounted for nearly 6 percent of all radio listening in the U.S.